U-turn toward self

It’s distressing to me how much energy I spend thinking about relationships or people in ways that are not productive, with a focus on the other person, or how I could have made it work, even when it’s not a healthy situation or person to pursue. My pattern has typically been to look for someone else and put my attention on them, or a relationship with them. I know the focus needs to be on me, my relationship with myself, my patterns, and how to break unhealthy patterns and develop new healthy ones. One of my favourite psychologists, Terra Brach, talks about making a u-turn, and focussing back on self. This is my goal right now. When I start ruminating, I visualize myself making a u-turn that drives me into myself. I often feel like my ruminative habit borders on obsessive, which is torture. But I’m trying to tell myself it’s a habit I can break with practice. How do you bring the focus away from others and back to yourself?